Emperor's
Tea Pill is a famous classical formula for disturbed shen. Of all
the formulas for treating insomnia, it may be the one that is most used
clinically. In all of the versions, Rehmannia makes up at least 28% of
the formula, which nourishes blood and yin while cooling blood
heat. This formula contains no heavy minerals to subdue yang, and
is intended for heart and shen conditions marked by blood and yin
deficiency with heat. Deficiency heat agitates the heart, causing
palpitations. As yang and heat rise to the brains, it creates
insomnia and anxiety. *